TWI642485B - Liquid material coating device - Google Patents

Abstract

Provided is a liquid material coating apparatus that can reduce programming work for realizing desired line drawing coating (drawing coating).

A liquid material coating device includes a discharge head that discharges liquid material, a workpiece table on which a workpiece is placed, a robot that relatively moves the discharge head and the workpiece table in the XYZ direction, and a memory having a computing device and a memory coating program. The control unit of the device is a liquid material coating device that relatively moves the workpiece and the ejection head on the one hand, and paints the liquid material on the workpiece on the other hand. The control unit is configured to include a first control unit. Which relatively moves the workpiece and the ejection head according to the coating program; and a second control unit that controls the ejection amount of the ejection head; the first control unit has a function of moving the ejection head relative to the workpiece at a predetermined timing; The second speed control unit has a function of outputting the speed information. The second control unit has a function of automatically controlling the discharge amount based on the speed information output from the first control unit.

Description

Liquid material coating device

The invention relates to a liquid material coating device, which can make a discharge device relatively move a workpiece, and can automatically generate an instruction, which controls the coating device to perform a desired line coating (drawing coating) on the workpiece. The spit amount.

The line drawing coating in this specification is not only a case of coating and drawing a continuous line, but also includes a case of performing coating drawing by intermittent coating.

In order to form a liquid material into a predetermined pattern during the manufacture of electronic equipment, a dispensing device called a dispenser is often used. Dispenser is widely used in the manufacture of large machines and even small machines. For example, it is used for linearly coating phosphors or adhesives on flat panel displays such as liquid crystal, organic EL, and plasma display panels (PDP). A step of applying the adhesive on the outer periphery of the cover in a linear manner to fix the cover of the smartphone.

The coating operation using a dispenser is performed by relatively moving the nozzle and the workpiece table according to the coating pattern, while discharging liquid material from the nozzle. In a coating pattern having a corner portion, it is known that there is a problem in that when a line drawing coating is performed, a decrease in a relative moving speed at the corner portion causes irregularities in the line width formed by the drawing.

As a dispensing method of the dispenser, for example, there is a pneumatic dispenser that applies air supplied from a compressed air source to a liquid material in a storage container and discharges from a nozzle connected to the storage container.

As an air-pressure type dispenser that suppresses the deformation of the pattern on the corners during drawing, for example, Patent Document 1 discloses a coating machine for a coating method in which a quadrangular pattern is drawn on a substrate. At the beginning of the corner, the relative speed of the nozzle and the substrate is decelerated, and the discharge pressure of the glue is reduced. At the same time, the relative speed of the nozzle and the substrate is accelerated after passing through the corner and before reaching the end of the corner. At the same time, the discharge pressure of the glue is increased, thereby suppressing the occurrence of vibration at the corners, so that the correct coating amount can be applied. In addition, the above-mentioned control is performed based on the pattern data stored in the RAM of the microcomputer, and the start and end positions of the corners are determined by a linear scale measurement.

In a coating apparatus including a discharge device, a work table, and a relative movement robot (XYZ-direction moving device) that relatively moves the discharge device and the work table, in order to achieve the desired line drawing coating, the following program design is required.

First, a relative movement instruction for relatively moving a relative mobile robot according to a coating pattern needs to be programmed. Secondly, it is necessary to program a discharge amount control command that controls the discharge amount of each coating position on the coating pattern. The discharge amount control command is, for example, a command to reduce the pressure of the air for discharge, make the distance between the annular valve seat communicating with the discharge port and the valve body, or reduce the rotation speed of the screw that supplies the discharge propulsion force. In order to change the ejection amount on the XY coordinates of the place where the relative movement speed of the corner or the like changes, it is necessary to transmit the ejection amount control command in conjunction with the relative movement command.

For example, in paragraphs [0085] to [0093] of Patent Document 2, a program design for moving an automatic robot arm along a coating pattern, and the start and end time of coating of the coating of the servo spray gun are described. Program design, and record the program design data in a PLC (programmable logic controller), and regenerate it in the PLC to perform automatic coating processing.

The above-mentioned relative movement program may be character-based programming based on characters, numbers, and symbols, or may be automatically generated by drawing graphics using a CAD program.

The applicant proposes a program in Patent Document 3, which includes: a step of displaying a text input screen; a step of displaying a graphic input screen; and using the movement information of the operating device input from the text input screen as a path and its height on a two-dimensional plane Steps of outputting information to the graphic input screen in real time; Steps of outputting mobile information of the operating device inputted from the graphic input screen to the text input screen in real time; based on the operation of inputting from the text input screen and / or graphic input screen The movement information of the device includes the steps of displaying a 3D display screen outputting the movement information of the operating device as a path in a three-dimensional space; and the step of automatically generating an input (relative) movement program of the operating device.

[Prior technical literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2005-218971

Patent Document 2: Japanese Patent Laid-Open No. 2009-172452

Patent Document 3: International Publication No. 2009/031305

It is known that in order to realize the desired line drawing (drawing coating), it is necessary to perform programming by linking the moving speed and the discharge amount control. However, it takes a lot of time and effort to program the program by linking different parameters, so it is necessary to reduce the work. Conditions for making the thickness of the coating line uniform. For example, it is necessary to divide the coating trajectory of the corner into a plurality of line segments, and adjust the speed and discharge amount of each line segment. The operation of trying to find out the conditions by mistake, but the above operations represent the need to repeatedly modify the control code of the movement speed and the discharge amount.

The above-mentioned problems have become particularly apparent in response to the needs of other varieties and small-scale production.

Therefore, an object of the present invention is to provide a liquid material coating apparatus which can reduce the programming work for realizing the desired line drawing coating (drawing coating).

The present invention relating to a liquid material coating device includes a discharge head for discharging liquid material, a workpiece table on which a workpiece is placed, a robot for relatively moving the discharge head and the workpiece table in the XYZ direction, and a computing device and memory coating. The control unit of the memory device of the cloth pattern. The liquid material coating device moves the workpiece and the ejection head relatively on the one hand, and paints the liquid material on the workpiece on the other hand. The control unit is composed of It is provided with: a first control unit that relatively moves the workpiece and the ejection head according to a coating program; and a second control unit that controls the ejection amount of the ejection head; the first control unit has a predetermined timing A function of outputting speed information of the ejection head with respect to the workpiece, and the second control unit has a function of automatically controlling the ejection amount based on the speed information output from the first control unit.

Among them, the first control unit and the second control unit may be implemented as one control unit that is physically integrated, or may be implemented as two control units that are physically separated.

The liquid material coating device may be characterized in that the speed information of the ejection head output by the first control unit is a scalar quantity of the relative moving speed of the workpiece and the ejection head, and the first control unit Or the second control unit is provided with a conversion unit that outputs the output amount information corresponding to the scalar quantity, and the second control unit is provided with There is a function of automatically controlling the discharge amount based on the discharge amount information output from the conversion section, and further, it may be characterized in that the conversion section is provided with a conversion table that formulates the discharge amount information corresponding to the pure amount, Or the said conversion part is provided with the conversion formula which calculates the discharge amount corresponding to the said scalar quantity. Among them, it is preferable that the conversion table is formulated with 5 or more different discharge amounts.

The conversion unit is, for example, a function module implemented by software stored in a memory device of the first or second control unit.

The liquid material coating device may be characterized in that the first control unit is provided with synchronization between the control of the discharge amount of the discharge head and the relative movement of the discharge head by the second control unit. Its function.

In the liquid material coating device, the first control unit may be mounted on the robot, and the second control unit may be connected to the robot via a cable.

According to the present invention, it is possible to reduce the programming work for realizing the desired line drawing coating (drawing coating).

1‧‧‧ coating device

10‧‧‧ Dispenser

20‧‧‧ Robot

21‧‧‧X-axis moving device

22‧‧‧Y-axis moving device

23‧‧‧Robot head (Z-axis moving device)

24‧‧‧stand

25‧‧‧Workbench

26‧‧‧Workpiece

28‧‧‧ Mobile components

30‧‧‧Robot controller (first control unit)

31‧‧‧Memory device

32‧‧‧ Computing Device

40‧‧‧ Dispenser Controller (Second Control Section)

45‧‧‧ Conversion Department

50‧‧‧ Dispensing head

53‧‧‧Ejection Department

54‧‧‧ Nozzle

55‧‧‧ Spit Out

56‧‧‧ syringe

61‧‧‧X-axis drive source

62‧‧‧Y-axis drive source

63‧‧‧Z-axis drive source

64‧‧‧Ejection amount control device

80‧‧‧Cable A

81‧‧‧Cable B

82‧‧‧Cable C

D‧‧‧Control

V‧‧‧moving speed

FIG. 1 is a perspective view showing an external appearance of a coating device of the present invention.

FIG. 2 is a block diagram showing a control section and related elements.

FIG. 3 is a diagram for explaining an example of controlling the discharge amount.

Hereinafter, examples of the embodiments for implementing the present invention will be described.

As shown in FIG. 1, the coating device 1 of the present invention includes a dispenser 10 and a robot 20 as main constituent elements. Hereinafter, each element will be described in detail.

<Dispensing machine>

The dispenser 10 has a dispenser controller 40 and a dispenser head 50 as main components.

The dispenser controller 40 includes a memory device and a computing device, and outputs a discharge operation command that controls the discharge operation of the dispenser head 50.

The dispensing head 50 includes a discharge portion 53 and a discharge amount control device 64, and discharges a liquid material from a discharge outlet 55 based on a desired discharge condition based on a discharge operation command signal output from the dispenser controller 40.

The dispenser 10 illustrated in the embodiment is a plunger-type dispenser. Here, the plunger type refers to a method of discharging a liquid material by the action of a plunger that slides inside the metering tube while reciprocating on the one hand. In other words, the plunger-type dispenser is a person who discharges liquid material by reducing the volume in the metering tube by the plunger's in and out action. It discharges liquid material on the same principle as a syringe.

The discharge portion 53 included in the dispensing head 50 of the embodiment includes a measuring tube (not shown), a plunger (not shown), and a nozzle 54 (see FIG. 2) having a discharge port 55. The discharge amount control device 64 is a stepping motor (discharge motor) that moves the plunger back and forth within the measuring tube. That is, the reciprocating movement of the plunger is controlled by the rotation of the discharge motor. In more detail, the greater the number of rotations of the discharge motor, the longer the plunger moving in and out, and the faster the rotation speed of the discharge motor, the faster the plunger moves forward. The plunger is retracted in a measuring tube (not shown), and the liquid material is sucked in from the syringe 56.

<Robot>

The robot 20 includes an X-axis moving device 21, a Y-axis moving device 22, and a robot head. 23. Bench-top device for stand 24 and robot controller 30.

The X-axis moving device 21 is a gate-type device supported by two pillars, and uses an X-axis driving source 61 as a driving source. A robot head 23 is arranged on the X-axis moving device 21, and the robot head 23 can move to an arbitrary coordinate in the X direction.

The Y-axis moving device 22 is laid on the gantry 24 and uses a Y-axis driving source 62 as a driving source. A work table 25 is arranged on the Y-axis moving device 22, and the work table 25 can be moved to any coordinate in the Y direction. A workpiece 26 is detachably held on the workpiece table 25.

The robot head 23 includes a moving member 28 and a Z-axis driving source 63, and constitutes a Z-axis moving device using the Z-axis driving source 63 as a driving source. That is, the robot head 23 can move the moving member 28 freely toward any coordinate in the Z direction by the Z-axis driving source 63. The dispensing head 50 is detachably fixed to the moving member 28 composed of a plate. Therefore, the dispensing head 50 can also move freely toward any coordinate in the Z direction by the Z-axis moving device.

Each of the drive sources 61 to 63 is configured by, for example, a stepping motor, a servo motor, and a linear motor.

The gantry 24 has a built-in robot controller 30 that controls the movement of the robot.

When the dispensing head 50 and the workpiece 26 are relatively moved by the robot 20, a desired coating pattern can be applied for drawing. The coating pattern includes at least one portion that, on the one hand, discharges a liquid material from the dispensing head 50 and on the other hand changes the relative moving speed.

<Control section>

The control unit of the embodiment is composed of a robot controller 30 and a dispenser controller 40. Hereinafter, the robot controller 30 is referred to as a first control section 30, and the dispenser controller 40 is referred to as a second control section 40. In addition, there may be cases where the first control unit and the second control unit are physically separate from each other, and the first control unit and the second control unit are physically implemented as a single control unit.

As shown in FIG. 2, the first control unit 30 includes a memory device 31 that memorizes a coating program in which a relative movement instruction is described, and a computing device 32 that executes the coating program.

The first control unit 30 executes the coating program and transmits a relative movement instruction to the X-axis moving device 21, the Y-axis moving device 22, and the Z-axis moving device 23 through the cable B81 to realize the dispensing head 50 and the workpiece 26. Relative movement.

The coating program includes a command to move the XYZ axis moving device (21 to 23) linearly or curvedly to a specified coordinate, a movement speed setting command of the dispensing head 50, a discharge start command, and a discharge end command. In the coating program of the embodiment example, no instruction regarding the discharge amount control is described. The coating program of the embodiment is processed by a literal translation method.

The second control unit 40 includes a memory device and a computing device, and transmits a discharge operation command to the dispensing head 50 via a cable C82. The discharge operation command includes a discharge start command, a discharge end command, and a discharge amount control command.

Furthermore, the second control unit 40 includes a conversion unit 45 implemented by software stored in a memory device. The conversion unit 45 of the embodiment has a relational expression or conversion table showing the relationship between the moving speed V of the dispensing head 50 and the control amount D of the discharge amount control device 64. The conversion unit 45 uses the moving speed V in a relational expression or conversion table to calculate a control amount D for achieving the set line width. The moving speed V is a scalar of the relative moving speed of the workpiece 26 and the dispensing head 50.

In the embodiment, since the discharge amount control device 64 is a discharge motor, the control amount D is the rotation speed (the number of rotations per unit time) of the motor. Relational expressions or conversion tables need to be made in advance based on theoretical and experimental values. The relational expression or conversion table is preferably set up in a hierarchical manner with 5 or more different discharge amounts. Furthermore, in order to realize a plurality of coating line widths by using one coating device 1, it is necessary to prepare the same number of relational expressions or conversion tables as the coating line widths to be realized.

The first control unit 30 and the second control unit 40 are electrically connected by a cable A80 to enable communication. The first control unit 30 transmits a discharge start / end command from the coating program and the moving speed V of the dispensing head 50 to the second control unit 40. The movement speed V of the dispensing head 50 is transmitted to the second control unit 40 when a movement speed change instruction from the coating program is issued, or at a predetermined time interval. The acquisition of the moving speed V by the second control unit 40 may also be performed by a polling method of transmitting a request from the second control unit 40 to the first control unit 30.

When the second control unit 40 receives the moving speed of the dispensing head 50, the optimal control condition of the discharge amount control device 64 is obtained by using the aforementioned relationship or conversion table possessed by the conversion unit 45.

<Example of Control of Discharge Volume>

The upper section of FIG. 3 is an imaginary diagram showing a conversion table of the control amount D ₁ to D _n of the discharge amount control device 64 corresponding to the moving speed V ₁ to V _{n of the} dispensing head 50. The moving speeds V ₁ to V _n are described in scalar (absolute value), so the same conversion table can be used during acceleration and deceleration.

The lower section of FIG. 3 is a graph showing the discharge amount control when the moving speed of the dispensing head 50 is decelerated from V ₁ to V _n .

In the initial state of FIG. 3, the dispensing head 50 is moved at the moving speed V ₁ , and the discharge amount control device 64, that is, the discharge motor is controlled at a rotation speed per unit time D ₁ . Information on the moving speed of the dispensing head 50 is transmitted from the first control section 30 to the second control section 40 every Δt. When there is a change in the moving speed V, the conversion unit 45 included in the second control unit 40 calculates a corresponding control amount D based on the conversion table.

If the moving speed of the dispensing head 50 is reduced to V ₂ , a deceleration command is output from the second control section 40, and the discharge amount control device 64 is decelerated to a rotation speed of D ₂ . Similarly, if the moving speed by V _3, V _4, ..., V _n-1 to reduce the order, the correspondence thereto from the second control unit 40 sequentially outputs the deceleration command, the discharge amount control means 64 will also rotate speed is reduced To D ₃ , D ₄ , ..., D _n-1 . If the movement speed of the dispensing head 50 reaches V _n and is maintained, a deceleration command is output from the second control unit 40, and the discharge amount control device 64 also decelerates the rotation speed to D _n . While the moving speed is maintained at V _n , since the speed change command is not output from the second control unit 40, the discharge amount control device 64 maintains the rotation speed D _n .

In the lower part of FIG. 3, a case where the moving speed V of the dispensing head 50 linearly decreases is illustrated, but in the case of a non-linear change, the discharge amount control device can be controlled in the same manner as described above. As long as the control amount D of the discharge amount control device 64 corresponding to the moving speed V of the dispensing head 50 is selected from the conversion table, and the discharge amount control device 64 is controlled by the control amount D.

Furthermore, a relational expression and a conversion table may also be used in combination, for example, a conversion table is used within a certain speed range, and a relational expression is used if it exceeds a certain speed range.

<Implementation of coating operation>

The coating apparatus 1 automatically performs a coating operation by executing a coating program prepared in advance.

If the coating program stored in the memory device 31 of the first control unit is read out and executed by the computing device 32, a relative movement instruction is transmitted to the X-axis moving device 21, the Y-axis moving device 22, and the Z-axis moving device 23, and A discharge start / end command is transmitted to the second control unit 40. Furthermore, a specification may be set in which the ejection end instruction is not included in the coating program, and the ejection end is completed after a certain period of time has elapsed from the ejection start instruction.

The information of the moving speed V of the dispensing head 50 is synchronized with the execution of the coating program and is periodically transmitted to the second control unit 40. Here, in this embodiment, the information of the moving speed V refers to the information realized by the X-axis moving device 21 and the Y-axis moving device 22 X-Y plane movement speed information. However, different from the embodiment, the moving speed information in the coordinate system such as the X-Z plane, Y-Z plane, and X-Y-Z space may be transmitted periodically.

When the second control unit 40 receives the information of the discharge start / end command and the movement speed V from the first control unit 30, it transmits a discharge operation command to the dispensing head 50. The discharge start and end instructions in the discharge operation instruction are described in the coating program, but the discharge amount control instruction in the discharge operation instruction is not described in the coating program. That is, the second control unit 40 dynamically generates a discharge amount control command based on the moving speed V of the dispensing head 50 described in the coating program. In the embodiment, since the output amount control device 64 is a stepping motor, the output amount increase command is a command to increase the rotation speed (the number of rotations per unit time) of the motor, and the output amount decrease command is the rotation speed of the motor (units) Rotation of time). That is, when the moving speed of the dispensing head 50 is increased, the second control unit 40 outputs a discharge amount increase command, and when the moving speed of the dispensing head 50 is lowered, the second control unit 40 outputs a discharge amount decrease command. Since the discharge amount is controlled substantially in real time by the second control unit 40, uniform line width drawing and coating can be achieved by a less-known programming operation.

<Sync function>

In the present invention, there are features in controlling the movement speed and the discharge amount of the dispensing head in a timely manner, but there are also cases where the control timing of the discharge amount is slightly different due to the coating conditions. Therefore, the coating device 1 in a preferred form has a synchronization function for changing the movement speed of the dispensing head and controlling the discharge amount.

This synchronization function is realized by delaying the relative movement command transmitted from the computing device 32 to the XYZ axis moving device (21 to 23) by a predetermined time in the same manner. Here, the delay time required for synchronization is when the second control unit 40 obtains the information of the movement speed V of the dispensing head 50, transmits the discharge amount control instruction to the dispensing head 50, and the discharge amount actually starts to change when needed. between. Alternatively, the computing device 32 may first read the coating program and transmit the discharge amount control command before a predetermined time when the moving speed V is changed.

<Different spitting devices>

In the embodiment, an example of a dispenser that controls the amount of plunger in and out by a discharge motor has been described, but various types of dispensers can be used. In addition, the discharge amount control device 64 is changed according to the type of a dispenser, for example, as follows.

In the case of an air pressure type dispenser that applies pressure-regulated air to the liquid material in the storage container for a desired period of time, the discharge amount control device is a regulator, and the control parameters of the discharge amount are the discharge pressure and discharge. Pressure application time.

In the case of a Rotary Tubing Dispenser with a rotary piping mechanism, the discharge amount control device is a motor, and the control parameters of the discharge amount are the rotation direction, the number of rotations, and the rotation speed.

When the valve body collides with a valve seat provided at the end of the flow path communicating with the nozzle, or when the valve body stops immediately before impacting the valve seat, and the liquid material is ejected and ejected from the front end of the nozzle, The discharge amount control device is a solenoid valve, and the control parameter of the discharge amount is the discharge beat (the opening and closing interval of the solenoid valve).

According to the coating device of the present invention described above, since it is not necessary to describe the discharge amount control command according to the moving speed of the discharge device held by the robot, the production time of the coating program can be greatly reduced. In addition, the code amount of the coating program is also reduced as a whole, which not only reduces the causes of program errors, but also greatly reduces the time required for debugging.

In addition, it is sufficient that the operator only needs to learn the programming necessary to determine the relative movement instructions of the robot's motion, so that the training period of the operator can be shortened.

Claims (15)

A liquid material coating device includes a discharge head having a discharge port for discharging a liquid material, a discharge amount control section for controlling an amount of the liquid material discharged from the discharge port, a workpiece table on which a workpiece is placed, and a discharge head and a workpiece. A robot for relative movement of a table, and a control unit of a memory device having a computing device and a memory coating program. The liquid material coating device moves the workpiece and the ejection head relatively on the one hand, and paints the liquid material on the other hand. The workpiece is characterized in that the coating program includes a relative movement instruction for causing the workpiece and the discharge head to move relative to each other in accordance with a coating pattern, and a scalar description of a relative movement speed of the workpiece and the discharge head. The control unit is configured to include: a first control unit that relatively moves the workpiece and the discharge head according to a coating program; and a second control unit that controls a discharge amount of the discharge head; the first control And the second control unit each have a memory device and a computing device, and the first control unit and the second control unit Being electrically connected via a cable, the first control section has a function of directly transmitting the scalar to the second control section, and the second control section has a conversion section for outputting information corresponding to the scalar output, and A discharge amount control instruction of the discharge amount control section dynamically generated according to the scalar transmitted from the first control section to uniformly draw a line with a line width by the discharge head to automatically control the discharge The function of the above-mentioned spit amount of the head. For example, the liquid material coating device according to item 1 of the application, wherein the first control unit has a function of transmitting the scalar to the second control unit in parallel with the execution of the coating program. For example, the liquid material coating device according to item 1 or 2 of the scope of patent application, wherein the conversion unit is provided with a conversion table that formulates the discharge amount information corresponding to the pure quantity. For example, the liquid material coating device according to item 3 of the patent application range, wherein the conversion table is composed of 5 or more conversion tables corresponding to the discharge amount of 5 or more different line widths. For example, the liquid material coating device according to item 1 or 2 of the scope of patent application, wherein the conversion unit is provided with a conversion formula that calculates a discharge amount corresponding to the pure amount. For example, the liquid material coating device according to item 1 or 2 of the patent application scope, wherein the first control unit has a control of the ejection amount of the ejection head and relative movement of the ejection head by the second control unit Synchronization function. For example, the liquid material coating device according to item 1 or 2 of the patent application scope, wherein the first control unit is mounted on the robot, and the second control unit is physically and independently connected to the robot via a cable. Dispenser controller. For example, the liquid material coating device according to item 7 of the application, wherein the above-mentioned ejection head is provided with a selection from a plunger type dispenser, a pneumatic type dispenser, a piping type dispenser, and a jet type dispenser. A little melter. For example, the liquid material coating device according to item 1 or 2 of the scope of the patent application, wherein the conversion unit is provided with a conversion table that formulates the discharge amount information corresponding to the pure amount, and calculates the discharge amount corresponding to the pure amount. The conversion formula is used when the relative movement speed is within a predetermined speed range, and the conversion formula is used when the relative movement speed is outside the predetermined speed range. For example, the liquid material coating device according to item 1 or 2 of the patent application scope, wherein the first control unit has a function of synchronizing the control of the ejection amount of the ejection head with the relative movement of the ejection head by: The transmission timing of the relative movement instruction to the robot is delayed by a predetermined time; or the relative movement instruction to the robot is read in advance, and the discharge amount control instruction is transmitted from the second control unit before the predetermined time at which the relative movement speed is changed. To the above vomiting head. For example, the liquid material coating device according to item 10 of the application, wherein the above-mentioned ejection head is provided with a selection from a plunger type dispenser, a pneumatic type dispenser, a pipe type dispenser, and a jet type dispenser. A little melter. For example, the liquid material coating device according to item 3 of the patent application range, wherein the conversion table is shared between acceleration and deceleration. For example, the liquid material coating device according to item 1 of the patent application scope, wherein the conversion unit is a functional module executed by software stored in a memory device of the second control unit. For example, the liquid material coating device according to claim 7 in which the above-mentioned discharge amount control unit is mounted on a discharge head. For example, the liquid material coating device according to item 14 of the application, wherein the above-mentioned discharge head includes a valve seat which is arranged at the end of the flow path communicating with the nozzle, or the valve body is about to collide with the valve. A jet-type dispenser that stops in front of the seat and ejects liquid material from the front end of the nozzle. The discharge amount control unit is a solenoid valve. The discharge amount control command includes a command to control an opening and closing interval of the solenoid valve.